Testing 1-2-3 - Codewars

'''

Your team is writing a fancy new text editor and you've been tasked with implementing the line numbering.

Write a function which takes a list of strings and returns each line prepended by the correct number.

The numbering starts at 1. The format is n: string. Notice the colon and space in between.

Examples:

number([]) # => []
number(["a", "b", "c"]) # => ["1: a", "2: b", "3: c"]

'''

def number(lines):
    resultList = []
    for i in range(0, len(lines)):
        element = str(i+1) + ": " + lines[i]
        resultList.append(element)
    return resultList

# MAIN FUNCTION
print(number(["hello", "my", "friend"]))